CVE-2026-72283
KVM irqfd/IRTE use-after-free allows guest-triggered host kernel compromise.
Is CVE-2026-72283 being exploited?
Not confirmed. CVE-2026-72283 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-72283?
CVE-2026-72283 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-72283?
Yes. A fix has been recorded for CVE-2026-72283. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72283 affect?
CVE-2026-72283 affects Linux kernel (KVM/x86), KVM hosts, VFIO PCI devices/drivers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72283?
Install vendor kernel updates; patch VFIO/hypervisor components; isolate untrusted VMs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Guest or local attacker can trigger a host-kernel use-after-free, enabling memory corruption, privilege escalation, or guest→host escape.
Patch when possible
- affected>= 77e1b8332d1d7aa786f7515e9bd4055def6a1e06 and < d1379888cc4230bac647ec24ab83306afbd03e88
- affected>= 77e1b8332d1d7aa786f7515e9bd4055def6a1e06 and < d5560b6569cd05ba72c6b33427fbabc6ec46b8cf
- affected>= 77e1b8332d1d7aa786f7515e9bd4055def6a1e06 and < ed446e8aa894883c08892cfee69782fdf8f6c3ca
- affected6.17
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.